1. In this article is described the arrangement of a set of fairly simple apparatus for the determination of the osmotic coefficient as well as the activity coefficient on the isopiestic principle.

2. The paper also cites examples to illustrate the popularization and application of the technology of methanol isopiestic synthesis with high-pressure syngas.

3. It deals with lots of factors from the process of networks modeling, node demand calculation, initial flow distribution, and the optimal design to the drawing of pipe networks and isopiestic line.

4. The article includes three parts, which discuss network's calculation, and plot methods of isopiestic line respectively.

5. Based on the non-equilibrium thermodynamic coupling model, the isotherm, isopiestic and cross section phase diagrams for diamond growth in C-H-O system are calculated.